guess the movie quote

This quote came to mind as I wandered around our back yard looking at the stars while smoking a cigarette:

"Ah, yes. Yak dung...tastes good. Like a cigarette should."

(Don't click on the link until you think you know the answer, or give up - whichever comes first.)
I can see and hear the actor performing that line, in the theater of my memory. What a great movie.